Hello,my first post 79 firebird

[Greased-lightning]

Hello I have a 79 firebird with a 383 stroker

I need help converting over to TBI..
I have. A few questions...
my specks.
383 Stroker scat assy.
Howards cam 110051-10
procomp alum. heads 210cc runners 64cc chambers
12cc dish Pistons.
"...........................
parts I have

5.7 Tbi.
Wire harness 95 4x4 suburban
95 Ecu suburban with 4l60e trans prom
4l60e trans
.......................................
how large can I bore out the tbi? 46mm?
What inline fuel pump should I get on a budget?

Thanks in advance

[DOCBAWRENCHTURNER]

Like most things, you can spend as much as you want to. Most people building high levels of power run a 454 throttle body does to it's larger flow capacity. It is my opinion that an In-tank fuel pump would be superior, I believe that models similar to the Airtex E2000 are popular for this. There is also a modification that was done on another thread with a modified fuel pump module to overcome the fact that your factory pump probably doesn't have any baffles.

[Greased-lightning]

Thanks I am considering that. I got the 5.7 tbi because I read that the 454 tbi had idle issues

[dave w]

Thanks I am considering that. I got the 5.7 tbi because I read that the 454 tbi had idle issues

I have a 454 Throttle Body on my 93 K1500 / 5.7 liter / 4L60E, which has a very similar harness and ECU you have posted. I custom tuned (programmed) my own chip, so no, I don't have idle issues! Best I can figure, there could be some WRONG information about 454 Throttle Bodies? Heck, the money I saved using a 454 Throttle Body vs. the cost of a custom bored 350 throttle was HUGE!

I would recommend using a frame mounted fuel pump the 1985-1989 Ford F150 Electric Fuel Pump ... sometimes called the E2000 (Airtex part number) fuel pump.

dave w

[Greased-lightning]

Excellent thanks I'll get rid of the one I have and get a 454

[Greased-lightning]

i contacted tbi chips and was told that my setup was to powerful for a tbi to stay carbed.
What is the tuning limits of a 454 tbi?
Here are my specs if anyone can give me some advice thanks

383 stroker
howards cam 110051-10
duration 289/297 lift .488/507 op range 2800-6800
procomp alum heads 210 cc runners 64cc chambers
edelbrock air gap intake